Kakuro

Language:

4x4: easy intermediate hard challenging expert
6x6: easy intermediate hard challenging expert
8x8: easy intermediate hard challenging expert
9x11: easy intermediate hard challenging expert
9x17: easy intermediate hard challenging expert

Kakuro is like a crossword puzzle with numbers. Each "word" must add up to the number provided in the clue above it or to the left. Words can only use the numbers 1 through 9, and a given number can only be used once in a word. Every kakuro puzzle has one and only solution, and can be solved through logic alone.

Kakuro Blog
Kakuro Rules
Kakuro Tutorials: Basic Challenging

Kakuro Hint: Not sure what all of the valid combinations are for a number? Click on the number clue, and a tooltip will show you the possibilities.

			9	12	17	3		21	11
	8	26 28					10
23							5 42
6			3 12			20 11
20				18 37				12
	17				19				12
	7	3 19			11 17
12			6			17 38
8			30 30					15	24
45
	10	12 7					12
10				13 7			17 11
21					6			17
	6				10 15				17
	19	10 10				12 21
7				11 15			14 16
16			39
10			25

Free online kakuro puzzles